DE2021451A1 - Device for distributing liquids - Google Patents

Description

2Q2H51

PATENT LAWYERS

DR.-ING. BY KREiSLER DR.-ING. SCHÖNWALD DR.-ING. TH. MEYER DR. FUES DIPL.-CHEM. ALEK VON KREISLER DIPL.-CHEM. CAROLA KELLER DR.-ING. KLÖPSCH

COLOGNE 1, DEICHMANNHAUS

Cologne, April 3o, 1970 AvK / Bn.

Soherico Limited, Luzern / Sohweiz, Töpferstr. 5 Device for distributing liquids

This invention relates to a device for dispensing of foamable liquids, the parts such as a container for holding the foamable liquid, a neck tube and a with said container and said Connection tube in connection is element for generating a foam from gas and liquid. The device this invention is characterized in that it is also has a valve that allows a gas from the outside into the Entering the inside of the container, creating a flow from the outside is formed inwardly, which differs from that between: The foam-generating element and the outlet opening are different. The liquid enters the container introduced and enters through an extension pipe in the form of foam When the walls of the container are squeezed together '

or if compressed gas is introduced, the gas and liquid in the container will flow upwards a porous element pressed, whereby gas and liquid mixed and thus generate foam. After distributing of the single dose or batch of foam passes through the gas opening, whereby the part of the foam that remained in the extension pipe acts like a valve and the withdrawal of the Prevents foam from getting inside the container.

The improved device can be used for foamable liquid ΐ

Riding, such as medication, fluids, the ^.

Contain medication, dispose of hair packs or window cleaner Ϊ

be spent. In particular, it is used for mixing such '* ■'<

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Liquids with air used, the same being distributed in the form of a foam of air and liquid.

The device is particularly suitable for distributing medicaments which are applied in the form of foam. Such

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Foamed drugs are sometimes used in an outwardly open manner Body cavities used. Accordingly, quite long extension tubes are often required.

For example, as is apparent from US Patents 3,361,304 and 3,346,146, containers with collapsible walls are known. A group of containers with spouts or extension tubes for the distribution of liquids is known, as can be seen, for example, in US Patents 2,752,199 and 1,735,784. The two last-mentioned examples of the prior art describe constructions with elastic walls, a temporary increase in the pressure in the container being achieved by manually deforming one or more walls of the container. Although containers of this type, and particularly those described in US Patents 3,361,304 and 3 * 346,146, have been essentially satisfactory, certain difficulties have been encountered in dispensing medicaments and other foamable liquids in the form of foams from gas and liquid. These difficulties arise particularly when the liquid is to be distributed several times at short intervals, for example when the user squeezes the elastic container several times within a short time in order to obtain a relatively large amount of foam. In the case of certain flat, relatively short extension tubes, this difficulty is relatively small and does not deserve any special attention.

It goes without saying that foamable liquids are used in the present devices, as opposed to not foaming liquids in common devices with collapsible containers are used. Such dreamable ones Liquids generally contain surfactants and are known to those skilled in the art. Cause the friable liquids in the bottle with the one through the exit opening after each Spraying incoming air Foaming. After repeated use the container can be filled with foam in such a way that repeated squeezing forces foam through the air openings,

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so that the forces driving the air and liquid through the main exit port are changed. That in turn leads to an aohwexrcη foam as desired, or it will Liquid distributed through the foamer attachment. Therefore, for example, when quickly squeezing the container of the figure of patent 3,361,3OA penetrate foam into the interior of the container , whereby with repeated compression foam instead of air rise up through the openings 36 and therefore a will produce poor foam and / or inconsistent doses. If this is to be prevented, the device described may not treated in the manner described.

The foam formation inside the container in contrast to the desired foam formation outside the container is dependent on the amount of foam remaining in the extension pipe. The reader will see that after using the container has squeezed several times to create and distribute foam after the last squeeze some foam will remain inside the extension tube. This foam generally oozes out slowly, partially and differently, back into the air passage and also into the riser pipe itself. Even though the foam is usually not very viscous, this creates enough resistance in the riser pipe, so that when you squeeze it repeatedly * Little or more different or no foam formed a few times is, since the pressure increase on the surface of the liquid when the container is compressed tends to cause an outflow of air caused the air passage in the upper part of the container.

Such undesirable and unsatisfactory operation occurs particularly with repeated use on, if relatively long distribution pipes or extension tubes can be used. For example, extension pipes with a length of 0.3 to 30 cm are used when introducing of foam in a certain way. Body cavities, such as the rectum, vagina, or ear, are used. The behavior when distributing with such relatively long and elongated pipes and lugs, particularly lifts

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the above-described results and consequences of the forced masseh foam remaining in the extension tube at the end of each compression emerged. .

To overcome the difficulties described above in distributing foamed medicaments from containers with resilient walls To overcome this, various aids have been tried. Ea was found that a shut-off valve in the upper end of the riser helps to some extent. There was also a certain improvement found when trying different internal dimensions of riser pipes. Finally, an inlet valve was on the squeezable bottle itself built in and this brought a surprising improvement. This single valve in the wall of the container overcame difficulties and ■ no other valve was needed. Is the valve in the container wall installed, so minimal or no backflow of the foam can be determined. This surprising result is that Consequence of the following factors. Obvious is the viscosity of the foam in the narrow spaces of the porous foam-forming element so that the foam mass under certain conditions acts like a shut-off valve. The air that goes to Refilling the partial vacuum in the container above the Liquid drug needed occurs rapidly and preferentially through the valve in the container wall. Hence, ea is a consequence of this determination possible instead of several shut-off valves the foam itself as a shut-off valve at the upper end, des To use the riser pipe.

Drawings : :...·. -, ■. -. · ■, '■ __.' ■■

Figure, lvZ.elgt 4i.e.Frontanaicht of a typical container with ela-r .. atiacher wall .for.the- application of this invention , which is expedient, - ■ aua I ^ Laatik.odör: rähnlicheiii material. ,, - _■:; -. ·.

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FIG. 2 shows a cross section of the device of FIG.

Figure 3 is an enlarged detail of a partial view; which represents a typical shut-off valve in the container wall.

Figure U is a view similar to Figure 1 illustrating an apparatus of this invention.

Figure 5 is a cross-section of the upper part of Figure A.

Figure 6 is a portion of the cross-section of the figure taken along line 6-6. This was at a right angle too

applied to the section of FIG.

Figures 7 and 8 are plan views illustrating two positions of the side tube of the apparatus of FIG U.

Figure 9 is a view taken along line 9-9 of Figure 5 was taken.

Figure 10 is a view taken along line 10-10 of Figure 5 taken xjurde.

FIG. 11 is a cross section, similar to that of FIG. 5), which represents a modification of the device according to the invention.

The drawings will now be elucidated: the number 10 generally indicates a resilient walled container, suitable for the application according to the invention. The container has a main part or lower part 12, a central part 14- and an upper neck portion 16. As in the patent 3,34-6,14-6 is described, the outer surface of the neck 16 may be threaded to mate with a thread of a cap connected to xverden. The cap can also be made of plastic be. An elongated and removable head section 20 is provided in the central part thereof and is of major importance Flijnach 22 attached to the oboron part 'de3 Hfilaaa 16 as shown

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and is carried by a portion of the cap 18. A common one A riser made of plastic or a similar material is sufficient with one end to the bottom of the container - while that other end of the tube, for example, by friction fit (frietion fit) in a bore in the upper end of the head pile is attached. The number 26 denotes one of two air ducts , which are arranged taking into account the upper end of the riser pipe 24 and via the lower end with the Inside the Kofteiles 20 and waiter with the interior of the container in communication.

The upper ends of these air passage channels 26 communicate with a horizontally extending channel 28 which again with a vertically extending channel 30 in the upper part of the head part 20 is in connection. The cap 18 preferably carries a porous element 32 in the uppermost part, which rests on the opening and is attached. A nozzle 34, also made of plastic, is attached over the cap 18 and can even a thread 36 on the outside for connection to a second one Cap or a closure element, which is not shown, have. The uppermost part of the connecting piece 34 has an opening on, and the number 40 denotes a foam made of air and Liquid inside the nozzle.

In FIG. 3, the number 41 denotes a valve at the opening 42 in the wall of part 14. The opening can preferably be formed by a slightly reinforced part of the container wall which is designated by number 44. Number 46 denotes a flap which, in its closed position, is extended by a Line and in its open position by a dashed line Line is displayed. The curved arrows directed at the opening 42 denote air flowing in from the Environment flows into the interior of the container.

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The number 48 denotes a supply of foamable liquid that is enclosed in the container and is to be distributed. In use, the user takes the container 10 and squeezes the sides together, whereby the pressure in the volume V of the container above the medicament 48 increases. This will make the liquid driven upwards through the riser pipe 24 and exits through its uppermost part in the direction of the opening 30. Simultaneously the air that is in volume V is passed upwards through the Channels 26 and driven into channel 28. The flow of liquid coming up from the riser pipe 24 is caused by this air in the channel divided, and accordingly a mixture of "liquid" and air is formed immediately above the riser pipe 24. This

Mixture passes through opening 30 and hits the porous Element 32. A foam 49 is formed from the nozzle 3Λ is distributed through the exit opening 38.

In certain circumstances, compressed gas can also be used as an aid in pushing out. A separate container containing the compressed gas or a bulb-type handabmizer is connected to the device and, in operation, measured amounts of auxiliary gas are supplied. Such metered quantities can be generated by known devices, and also work as the bumps fc the surrounding air generated by manually compressing.

The reader can now recognize the situation that would exist if the valve 46 were not provided. After the walls of the container 10 have been pressed inwards by the user to their maximum deformation, the elastic walls move outwards into their starting position. This creates a partial vacuum in the volume V. A consideration of FIG. 2 shows that the partial vacuum is reduced by the air that is tinted from the surroundings through the analysis tube or through the upper opening, with the air

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some foam 40, which has remained in the Anaatzrohr, through the porous element 32 and into the opening 30 takes with it. here the foam is divided. A part goes through the riser pipe and part through the channels 26 and into the volume V des Container. If only once or twice. this behavior described is not particularly disturbing. but it is understandable that with extremely rapid compression within a short time when using a fairly long one Approach tube the amount of foam that is returned to the container 10 will, can be considerable. As explained above, leads the presence of foam in the container 10 almost always in the following distribution operations to a foam of air and Liquid that is composed differently than desired.

According to the present invention, a valve such as it is also shown in Figure 3, built into the container wall. The valve is a so-called one-way or shut-off valve and allows the surrounding air to enter the container but prevents the reverse flow. When the elastic Walls their original position after being squeezed take again, is partially due to the resulting Vacuum causes the valve 42 to open so that the air can penetrate from the environment and break the vacuum. As a result The foam residue 40 in the extension pipe acts on its viscosity in connection with the porous element like a valve and prevents the entry of surrounding air through the extension tube 34 » in contrast to the entry of foam into the container in an arrangement described above which does not contain a valve 4I.

It did veratänd ^ Lich that the same result .if (will not be achieved | _aa; shut-off valve in de _n top dea riser is je.injge.baut how, beiapielsweise / u top the Abaperrventili ,, 'part DEA Sjtaigiohrea deji ^ phen er.wMhntett U "S.Patents (3hrifJ;. 2,752,199 Furthermore erfindungagemMea iet, such a shut-off valve at the

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Spreading foam that creates a mass large enough to hold even when the partial vacuum is released after to act as a shut-off valve when the container is squeezed together, unnecessarily.

It will also be understood that the particular type of valve illustrated by Figure 3 is not essential to the present invention. For example, a spring loaded ball valve or any of the conventional valves can also be used. It also goes without saying that the valve can also be attached anywhere on the container above the liquid level. The flow resulting through the shut-off valve and through the opening 42 differs from a second flow which flows through the opening 30. The latter can also be referred to as the first or main outlet flow or outflow of the container.

As an example of dimensions that have been successfully employed, refer to U.S. Reference is made to U.S. Patent 3,361,304. For example, the outlet opening 30 can have a diameter from about 0.063 cm to 0.107 cm and the riser 24 has an inner width of about 0.055 cm to 0.208 cm in diameter

»Have, and the cross section of the opening 26 can be between approx
be approximately 0.0058 and 0.0116 cm.

A variant of the invention is described in FIGS. 4 to 11. Figure 4 shows a device similar to Figure 1, in which, the number 50 denotes a container that corresponds to the in Figures 1 and 2 shown similar iat. The number 52 denotes the lower main body of the device, similar to part 12 of Figures 1 and 2, which consists of a container with a narrowed opening. The top cap 54 is on the side walls of the mouth of the container g: qufgeachoben and is through a inside enlarged lip 55 held, like the thickened part 56

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in the upper part of the opening of the container 52 shows. The cap 54 gueh carries the important extension pipe 57, which has an inlet or Has main chamber 58 at its inlet end. A plug 59 is stored over the opening and closes the opening of the From the container. The plug has an opening or a channel the one on the upper surface of the plug by standing up Walls is surrounded. The number 62 denotes a foam-generating element, for example in the form of a wire mesh. This Element is similar to element 42 of ITS Patent 3,34-6> 146. When foamable liquid passes through the grid 62, assisted the movement of the liquid passing through: the interstices the formation of the foam. The number 64 denotes another Part of the opening or channel through the plug 59 above the narrowed point 65. Slots 66 are provided in the wall of the opening. Number 68 denotes a riser pipe from the pipe socket 69 in the lower part of the plug 59 extends to the adjacent bottom of the container 52. The slots 66 allow air to pass through and make the connection with the interior of the container and the region of 65. The elements described so far , including the grid 62, can expediently be made of plastic. ·

The number 70 denotes an opening that extends through the

entire cap 40 extends and, as shown in Figure 5 , it, Ä

is connected to a second channel or the opening in the plug 59 in the working position. A ball element 74 rests on elevations which are formed within the opening. In the position shown, it is possible for the surrounding air to pass through the opening 70 and around the ball 74 into the interior of the container 52. In the event of a sudden increase in the pressure inside the container, the ball 74 is puffed upwards and thereby interrupts the flow of air through the opening 72.

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As shown in particular in FIGS. 7, 8 and 9, the cap 54 can be rotated on and over the opening 52. In the position which is shown in Figure 7, the opening 70 is in the Cap 54 with the opening 72 in the plug 59 in connection. Furthermore, the chamber 58 at the end of the connecting piece 57 is in connection with the opening 60 and the network 62. This is the distribution position of the cap on the container. After distributing is finished has been, the cap is from that shown in FIG Position rotated into the position shown in Figure 8, if you want to keep the container until the next use wishes. The opening 70 is then no longer in connection with the opening 72. An arcuate slot 71 carries a downwardly expanding curvature around the circumference of the Opening 70 and acts as a guide. The opening 72 is thus protected from the environment during storage. The extension pipe 57 carries the important part 76 which has therein a curved channel 78 in which the walls around it Opening 60 and which they are adjacent to. During the Rotation strokes the curved channel over the upwardly expanding parts around the opening 60. In the position that As shown in FIG. 8, the opening 60 is not in communication with the chamber 58 and the contents of the container 52 is protected accordingly. The device described above is handled in the same way as that of the device described in FIG. The air channels 66 correspond to the channels 26, their effect for the production of the foam in cooperation with the grid 62 is also corresponding. As with Figure 2, a compressed gas can be used as an aid «

A modification of the device is described in FIG. wherein the riser pipe 68 is attached to the lower part of the opening 72 is instead of opening 69. During use With this device, the container 52 is compressed a number of times. The rolling back of the elastic site wound into the original

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initial shape of the container 52 is obtained from the inflow of Air is accompanied through the opening 70 into the riser 68. Some Foam is generated inside the lumen of the riser pipe. Upon repeated squeezing, the interior of the container 52 Filled with foam above the liquid level, which exits through the extension pipe 57. He passes through the network 62, where it will be re-formed before the final exit. As with the other devices, a measured auxiliary propellant from a gas source with the opening can be used if desired .be connected, whereby the compression of the container is no longer required.

Although use primarily in the manner illustrated is planned, with foam being distributed in an upright position is, the arrangement of each variant is also suitable for distributing liquid, with the container being turned upside down and then the compression or the introduction of compressed propellant gas takes place. A jet of liquid can also be distributed by removing the foam-forming element 32 in FIG. 2 or the foam-forming element 62 in FIG and use the manifold in the upright position.

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Claims (1)

APR-28-1970 P ₁₀ Claims 1.1 A device for distributing foamable liquids, which has a container for receiving a foamable liquid, an extension tube, an element, which is connected to said container and the extension tube, for generating a foam from gas and liquid, characterized in that said The device also has a valve which only allows a gas to enter the interior of the container, whereby an outward-inwardly directed flow is formed which differs from the flow occurring between the foam-forming element and the outlet opening. 2. A device according to claim 1, characterized in that said container has a resilient wall. . shows. 3. An apparatus according to claim 1 or 2, characterized characterized in that said valve is a shut-off valve, the entry of the surrounding gas, preferably air, into the Inside of said container allowed. fe U ' A device according to any one of claims 1 to 3, characterized in that it has an attachment tube which is in communication with a foam-forming element which adjoins one of the openings of the container. A device according to one of claims 1 to 4, comprising the following parts: a removable outlet pipe located above the outlet opening; a riser pipe which is connected to said outlet portion and serves to convey the liquid from the container to the outlet opening, once the contents of the container gedrüokt y a rohrformige Haltor "- clothes for the foamer, the iat removable and coaxial by -13- 609848/0106 963-FTG-U-IK-ug Outlet part is carried, said holder having an opening which has a significantly larger diameter than said outlet opening} a porous element which lies in said holder above said opening and is at a corresponding distance from said outlet part \ parts for closing for said device. 6. An apparatus according to claim 5 comprising a container with a deformable side wall which can be pushed inwards to remove the liquid from the container to convey to the outlet opening. 7. An apparatus according to claim 6 comprising a chamber has to accommodate the foam, which has an opening, is removable and is held by said holder of the foamer. 8. A device according to any one of claims 1 to 7, which comprises the following parts: a container with an outlet opening for gas and liquid j a riser pipe that is connected to the opening for gas and liquid and serves to direct liquid from the container to the outlet opening for gas and liquid as soon as the container is pressed; Divide for the gas outlet, di6 from the top Part of the interior of the container to the said outlet opening for Gas and liquid in the container above the upper end of the riser pipe extend, as a result of which the gas that emerges from the parts in the container intended for the gas outlet, see with the The flow of liquid mixes the liquid into small drops divides and immediately afterwards from the outlet opening for gas and liquid exits j a holder for the foamer, which lies above the outlet opening and has an opening, the diameter of which is significantly larger than the said outlet opening . . -Η- 0 0 9 8 A 6/0108 BATH ORIGINAL 963-FTG-15 IK - ug 9. An apparatus according to claim 8, wherein said exit orifice is about 0.063 cm to 0.107 cm in diameter ; said riser pipe has an inner width of the order of magnitude of about 0.055 cm to about 0.208 cm and the parts for the outlet of the gas have a cross section of about 0.0058 to about 0.0116 cm. 10. A device according to one of claims 1 to 3 » which comprises: a container for containing a foamable liquid; one to close the container Stopper, the first opening of which is equipped with a one-way valve, which allows passage from the outside into the interior of the container. is provided and the second opening is provided with a foam-forming elementj a cap over said container and said stopper, which on the one hand carries an extension tube. one end of the extension tube with said second Opening is in connection, and 'on the other hand has an opening for the air inlet, which with the mentioned opening of the Plug is connected. 11. An apparatus according to claim 10, comprising a riser pipe extending from one of said openings of the The stopper hangs out in the said container. 12. An apparatus according to claim 10 or U, wherein said cap is rotatably mounted on said container is. 13 · A distributor device for a container according to Ginem of claims 10 to 13, which have a plug with two openings which can be introduced into the upper part of the container in one of the openings mentioned a one-way valve and in the other of the openings mentioned a ßchoumbildendes Elßment and also a riser, the -15- 009846/010 « AFR-28-1970 ₂ 963-FTG-16 ^{ZUZ 1} ^ ⁰ 'IK-ug is attached to one of the openings mentioned and from
hangs down there. -16-G098A6 / 0 108 Blank page